20. Which of the following bacteria is considered coliform?
A. E. coli
B. Proteus
C. Salmonella
D. Shigella
21. The Enterotube is used to distinguish between:
A. Staphylococcus and Streptococcus
B. Proteus and Salmonella
C. Bacteria and Fungi
D. Antibiotic-resistant bacteria
22. What type of specimen is used to inoculate an Enterotube?
A. Throat swab
B. Stool
C. Urine
D. Blood
E. Sputum
23. Which bacteria gives positive test for urease when growing on urea broth?
A. Proteus
B. Enterobacter
C. Salmonella
D. Shigella
24. Which bacteria gives positive test for decarboxylase when growing on lysine broth?
A. Proteus
B. Enterobacter
C. Salmonella
D. Shigella
25. The Lethal Effect of UV light is specifically caused by
A. UV –A
B. UV-B
C. UV-C
D. Infrared
